diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 27e09cc..138f8e8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -54,7 +54,7 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Rust
         uses: actions-rust-lang/setup-rust-toolchain@v1